Right befor I hit 70000 on Christmas day to be.

ANONYMOUS

MEMBER
2007 CHEVROLET COBALT
73,412 MILES

Right befor I hit 70000 on Christmas day to be exact my check engine light came on took it to auto zone to have the codes pulled and the codes pulled where p0016 witch ment my timeing belt or my crank shaft sensor or my cam sensor I had my timeing belt check by a pro said it looked great and there was no slipping no loseness nothing. So I went ahead and changed my sensors but the worst part about this is that when I sit at a red light or a stop sign my car starts to do a shaking rocking motion as if some one is pushing on my trunk and shaken it. I have had to drop 800 plus dollars into this car I just don't know what I can do to it a n y more can u help me out maybe? Thanks for Ur time and thanks for reading this

1 Reply

DUGSMOBILE

MECHANIC
38 POSTS

If your still having trouble with the cobalt maybe I can help. The engine in the cobalt should be a 2.2L 4cyl? If so that engine does not have a timing belt as it actually uses two(2) chains and guides. One chain for the cams the other is for a balance shaft in the bottom. If you have trouble with the balance shaft or it's chain that would explain the code as the misbalance at low rpm could cause a good vibration. That will also affect the chain to the cams and possibly throw the code. Another possibility is the Balancer on the end of the crank itself being seperated which could possibly have the same result. Any noises at all along with the vibration? Does the vibration occur only in drive or in park/neutral also? Good luck.